thread_logger_init.cpp

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// BSD 3-Clause License
// Copyright (c) 2021-2025, 🍀☀🌕🌥 🌊
// See the LICENSE file in the project root for full license information.
 
#include <kcenon/thread/core/thread_logger.h>
 
namespace {
 
void register_shutdown_handler() {
    // Register the shutdown handler
    // Since this runs early, it will be called late during shutdown (LIFO order)
    // This ensures is_shutting_down() returns true during static destruction
    std::atexit(kcenon::thread::thread_logger::prepare_shutdown);
}
 
#if defined(__GNUC__) || defined(__clang__)
// GCC/Clang: Use constructor attribute with priority 101
// Priority 101 runs after CRT initialization (65535-100) but before
// user constructors (default priority is 65535)
// Lower numbers = earlier execution, so 101 is very early
__attribute__((constructor(101)))
static void early_register_shutdown_handler() {
    register_shutdown_handler();
}
 
#elif defined(_MSC_VER)
// MSVC: Use CRT initialization section
// .CRT$XCU runs during C++ static initialization, early in the process
 
#pragma section(".CRT$XCU", read)
 
// Function pointer that will be called during CRT initialization
static void __cdecl msvc_register_shutdown_handler() {
    register_shutdown_handler();
}
 
// Place the function pointer in the .CRT$XCU section
// This causes it to be called during CRT initialization
__declspec(allocate(".CRT$XCU"))
static void (__cdecl *p_msvc_register_shutdown_handler)() = msvc_register_shutdown_handler;
 
#else
// Fallback for other compilers: Use static initialization
// This is less reliable for initialization order but better than nothing
namespace {
struct ShutdownHandlerRegistrar {
    ShutdownHandlerRegistrar() {
        register_shutdown_handler();
    }
};
static ShutdownHandlerRegistrar shutdown_handler_registrar;
}
#endif
 
} // anonymous namespace